References of "Unpublished conference/Abstract"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailSustainability, Strategy and Management Control: A Review of the Literature
Crutzen, Nathalie ULg; Herzig, Christian

Conference (2012, September 04)

The purpose of this research is to explore the emerging body of literature on the relationship between sustainability, strategy and management control. Our way to organise and present the literature aims ... [more ▼]

The purpose of this research is to explore the emerging body of literature on the relationship between sustainability, strategy and management control. Our way to organise and present the literature aims to both structure the state of our knowledge in this area and stimulate others to contribute to a shared and better understanding of this field of research. Previous research has underlined that (sustainability) management control systems play a key role in shaping processes of (sustainability/CSR) strategy formulation and implementation (e.g. Simons, 1990; Epstein and Wisner, 2005; Gond et al., 2011). While the relationship between management control systems and strategy has widely been investigated in the traditional accounting and control literature (e.g. Simons, 1990; Langfield-Smith, 1997; Ferreira and Otley, 2009; Tucker et al., 2009), this is much less frequent in the context of research related to the concept of sustainability. Indeed, until recently social and environmental accounting research has predominantly paid attention to external reporting and accountability (e.g. Albelda, 2011; Gray, 2002) or the link between corporate social responsibility/environmental management and economic performance (e.g. Henri and Journeault, 2010). Conscious of this situation, several researchers have stressed the need for research on the interrelation between sustainability, strategy and control (Parker, 2000; Chung and Parker, 2008; Durden, 2008) and a growing body of literature has emerged over the last years. We hope that in reviewing and reflecting on how this emerging body of literature is organised we can contribute to a better understanding of our current knowledge and to the development of new knowledge in the future. The paper thus also aims to suggest future directions for research. Our interest in reviewing and codifying the literature is also driven by a practical need to further embed sustainability into organisations. Until today, it seems that many organisations are still confronted with difficulties in “operationalising” sustainability and translating their strategic aspirations for sustainability into practice in the midst of many other business pressures (Epstein and Roy, 2001; Schaltegger and Wagner, 2006; Taplin et al., 2006; CIMA and Accenture, 2011). [less ▲]

Detailed reference viewed: 513 (14 ULg)
Full Text
Peer Reviewed
See detailFactors influencing wild boar presence in agricultural landscape: a habitat suitability modelling approach
Morelle, Kevin ULg; Lejeune, Philippe ULg

Conference (2012, September 04)

The wild boar (Sus scrofa L.) population has increased in most parts of Europe during the last three decades. As a consequence, population distribution ranges have shifted to more agricultural areas ... [more ▼]

The wild boar (Sus scrofa L.) population has increased in most parts of Europe during the last three decades. As a consequence, population distribution ranges have shifted to more agricultural areas. These newly colonized areas are characterized by highly fragmented forest cover and a preponderance of crop fields and grasslands, thus increasing the risk of problematic interactions with farming activities and small game species. Although plasticity of wild boar to various environmental conditions is well known, understanding the ecological patterns that promote the density distribution of the species within agricultural areas remains of importance for adapted management strategies within these landscapes. Inside a recently occupied area (between 10-30 years of wild boar regular presence) of southern Belgium, we studied the relation between occurences of wild boar population, estimated by hunting bag and crop damages, with a set of environmental, anthropic and landscape variables. We used Maximum Entropy (MaxEnt) approach to analyze the data. Considering the main factors known to favour wild boar distribution, we hypothesized that crop fields providing cover and food, deciduous forest (providing mast) and water stream density are the main factors influencing the wild boar density distribution. The results are used to derive a habitat suitability map of wild boar distribution in northern Wallonia where wild boar recently starts to spread. [less ▲]

Detailed reference viewed: 100 (11 ULg)
Full Text
Peer Reviewed
See detailAnalysis of the Biocompatibility of Different Intraocular Lens (IOL) Material Using Mass Spectrometry Tisssue Imaging
Bertrand, Virginie ULg; Debois, Delphine ULg; Calligaris, David ULg et al

Conference (2012, September 04)

The cataract corresponds to the total or partial opacification of the lens of the eye preventing the passage of the light. At present, the surgery is the only effective treatment to overcome the cataract ... [more ▼]

The cataract corresponds to the total or partial opacification of the lens of the eye preventing the passage of the light. At present, the surgery is the only effective treatment to overcome the cataract. The surgical intervention consists in removing the cloudy lens and to replace it by an artificial intraocular lens (IOL). The in vivo implantation of these synthetic lenses involves the evaluation of several factors as their physico-chemical properties, their capacities to interact with lens epithelial cells and proteins, as well as their biocompatibility. During a previous study, we demonstrated major differences concerning the tackiness (atomic force microscopy), the cellular adhesion and the protein adsorption of various polymer disks intended for the manufacturing of intraocular lenses. The aim of this work was to correlate a histological analysis to a mass spectrometry imaging analysis performed on the same sample. To estimate the biocompatibility of the biomaterials, an animal testing was realized in rabbits. The various polymers were implanted subcutaneously. After one month, the 2 cm x 3 cm pieces of rabbit skin and underlying muscle with a 2 cm thickness were removed, fixed with formaldehyde 10% during six days, treated for the paraffin inclusion and stored at room temperature until use. Slices of 5 µm thickness were performed using a microtome. Paraffin was removed and tissue sections were washed in graded ethanol baths. The slices were then stained with the hematoxylin and eosin dyes. The analysis of stained sections showed different histo-morphological features according to the implanted polymer. For MALDI MSI purposes, on tissue protein digestion was performed using trypsin (1) and the MALDI matrix (α-cyanohydroxycinnamic acid, 5 mg/mL in ACN/0.2% TFA 70:30) was deposited using an ImagePrep automated sprayer (Bruker Daltonics, Bremen, Germany). Experiments were carried out using an UltraFlex II TOF/TOF mass spectrometer (Bruker Daltonics, Bremen, Germany). MALDI imaging can show the detection of different proteomic profiles according to the tested biomaterials, which may be considered as biocompatibility markers. The MALDI images of these markers are then correlated with the histo-morphological profiles. Consequently, mass spectrometry imaging can become a powerful tool in the evaluation of the biocompatibility of artificial implants in biomedical application. [less ▲]

Detailed reference viewed: 89 (4 ULg)
Full Text
See detailOrganometallic-mediated radical polymerization of vinyl amides: Effect of metal coordination
Kermagoret, Anthony ULg; Morin, A.; Hurtgen, Marie ULg et al

Conference (2012, September 04)

Detailed reference viewed: 54 (7 ULg)
Full Text
Peer Reviewed
See detailBiodegradable microcarriers based on chitosan and polyesters for tissue engineering
Demina, T; Akopova, T; Sevrin, Chantal ULg et al

Conference (2012, September 03)

Detailed reference viewed: 5 (1 ULg)
Full Text
See detailAutomated Mineral Mapping in Optical Ore Microscopy : accuracy and limitations
Pirard, Eric ULg

Conference (2012, September 03)

Detailed reference viewed: 179 (24 ULg)
Full Text
See detailThe structural complexity of phosphates in the Li-Fe2+-Fe3+ (+ PO4) system
Dal Bo, Fabrice ULg; Hatert, Frédéric ULg

Conference (2012, September 03)

Detailed reference viewed: 41 (10 ULg)
Full Text
Peer Reviewed
See detailCognitive Mediation and hyper-reflexivity: Analyzing a “non-valid” Rorschach protocol of a schizophrenic patient
Englebert, Jérôme ULg

Conference (2012, September 01)

Nous proposons de réaliser une analyse du Rorschach d’un sujet schizophrène en phase de stabilisation. Le protocole ne répond pas aux critères de validité (moins de 14 réponses et refus de planche à 3 ... [more ▼]

Nous proposons de réaliser une analyse du Rorschach d’un sujet schizophrène en phase de stabilisation. Le protocole ne répond pas aux critères de validité (moins de 14 réponses et refus de planche à 3 reprises) et ne permet donc pas de réaliser une analyse structurale complète selon les recommandations du Système Intégré. Cependant, une étude que nous qualifierons de « phénoménologique » se révèle intéressante. En centrant notre réflexion sur le processus de médiation cognitive, que le sujet emploie de manière idiosyncrasique lorsqu’il est confronté à la consigne du test, nous observerons que la démarche implicite de « fausse perception » qui est suggérée au sujet (« qu’est-ce que cela pourrait-être ? ») semble difficilement tolérable. La principale particularité de ce protocole consiste en une remise en question par le sujet des éléments perçus, pour finir, la plupart du temps, par rejeter la réponse fournie. Le recours à ce « doute méthodique » est superposable à ce que les théorisations modernes de la psychopathologie phénoménologique appellent l’« hyper-réflexivité schizophrénique » (Sass, 1992, 1994, 2001 ; Stanghellini, 2006). Nous pouvons également réaliser un rapprochement entre ce processus perceptif et les théories du « salience syndrome » développées par la neuropsychologie sociale (Van Os, 2009 ; Van Os & Kapur, 2009). Ces considérations nous permettent de rediscuter la pertinence de la remédiation cognitive basée sur la connaissance de la maladie et la reconnaissance des symptômes associés à laquelle a été soumis le patient. L’analyse du Rorschach nous donne également des informations intéressantes sur la stabilisation symptomatologique de notre patient et sur la composante résiduelle de son trouble schizophrénique. Ces observations semblent incompatibles avec des hypothèses homéostatiques et la possibilité d’un retour à un état antérieur à la schizophrénie, et démontrent l’utilité du diagnostic de schizophrénie résiduelle. Enfin, cette présentation cherchera à construire des ponts entre la méthode du Système Intégré et la psychopathologie phénoménologique moderne. [less ▲]

Detailed reference viewed: 62 (5 ULg)
Peer Reviewed
See detailThe Museum of Modern Art in Brussels: how 20 years of urban activism can fail
Houbart, Claudine ULg

Conference (2012, September 01)

The debate around the construction of the Museum of Modern Art in Brussels in the 1960’s and 70’s is the most revealing illustration of the urban struggle between « the ancients and the moderns”, in which ... [more ▼]

The debate around the construction of the Museum of Modern Art in Brussels in the 1960’s and 70’s is the most revealing illustration of the urban struggle between « the ancients and the moderns”, in which the associations play a crucial part besides the public authorities. From the beginning of the 1960’s, the implantation of the new building is the subject of numerous discussions where the “Ligue Esthétique”, a very conservative association proceeding from the Social Christian Party, founded in 1953, conflicts with the modernist designs of the Minister of Culture Pierre Wigny. Supporting the idea that the container should reflect the content, the Minister appoints the young architect Roger Bastin, whose project is also supported by the museum curator Philippe Roberts-Jones and the association “Les Amis des Musées”, lead by Count René Boël and comprising art patrons and lovers. Situated in a very delicate area of the city, besides the 18th century Place Royale and the Palace of Charles de Lorraine, the project plans the demolition of a historical building block occupied by dwellings and shops, and its replacement by a sculptural concrete building indicating the presence of the museum, almost entirely subterranean. This option earns the project the opposition of two more associations, which arise at the end of the 1960’s with very different backgrounds and aims. The “Quartier des Arts”, composed of members of the industrial aristocracy, politicians and public authorities representatives, is founded in 1967 with the aim of preserving the heritage of the area. Advised by the archaeologist and conservation expert Raymond Lemaire, the association is opposed to the demolition of one of the last ancient districts of Brussels. The ARAU (Atelier de recherche et d’action urbaine), founded in 1969 by the left wing sociologist René Schoonbrodt, fights for the maintain of the housing function of the city centre. The joint action of these very different groups of interest leads to a new version of the project and the giving up of the concrete signal building. But due to the length of the debates, more than a half of the ancient buildings have to be demolished and the other are very strongly restored: neither contemporary architecture, nor ancient heritage has won this urban battle. If the result of this long story seems today very disappointing as to urban design, the study of its mechanism is, on the other hand, particularly interesting: it reveals, through archival research, the complex relations between public and associative actors, where ideological and political considerations mix with personal – or even familial – relations and the hazards of urban life. [less ▲]

Detailed reference viewed: 61 (1 ULg)
Peer Reviewed
See detailStrategic bypass deterrence
Bloch, Francis; Gautier, Axel ULg

Conference (2012, September)

Detailed reference viewed: 12 (0 ULg)
See detailMesozoic marine reptile palaeobiogeography in response to drifting plates
Bardet, Nathalie; Fischer, Valentin ULg; Houssaye, Alexandra et al

Conference (2012, September)

Mesosaurus Broom, 1913, from the Early Permian, is the first aquatic reptile known in the fossil record. Its co-occurrence in both South Africa (South Africa) and South America (Brazil, Uruguay) made it ... [more ▼]

Mesosaurus Broom, 1913, from the Early Permian, is the first aquatic reptile known in the fossil record. Its co-occurrence in both South Africa (South Africa) and South America (Brazil, Uruguay) made it one of the key-fossils - with the pteridospermatophyta plant Glossopteris - used by the German meteorologist / geophysician Alfred Wegener to support his theory of the Continental Drift (Kontinentalverschiebung), first published in 1912. But Mesosaurus was only the “tip of the iceberg” as, during the Mesozoic, various clades of reptiles massively invaded the aquatic, and more especially, the marine realm. They were highly diversified both systematically and ecologically, and some of them were large top-predators of the marine ecosystems. The main groups were, in order of appearance in the fossil record, Ichthyosauria (earliest Triassic – early Late Cretaceous), Sauropterygia (nothosaurs, pachypleurosaurs, placodonts, plesiosaurs; Early Triassic – latest Cretaceous), Thalattosauria (Middle-Late Triassic), Pleurosauria (Early Jurassic–Early Cretaceous), as well as, among others, several lineages of Chelonians (e.g. chelonioids, bothremydids, “thalassemyds”), Crocodyliformes (thalattosuchians, dyrosaurids, pholidosaurids, gavialoids) and Squamates (mosasauroids, “dolichosaurs”, marine snakes). During the Mesozoic, the palaeobiogeographical distributions and the dispersion events of these marine reptiles closely followed the break-off of the Pangea induced by plate tectonic movements. Although marine reptiles can help in determining the possible date of opening of marine corridors, the information they provide are less precise than that delivered by terrestrial faunas, as the marine realm is a more open system and various migration ways are always possible. Generally, the Triassic taxa were animals with a restricted palaeobiogeographical distribution living near the coastlines of the Pangea. From the end of the Triassic and during the Jurassic, the break-off of the Pangea resulted in the formation of large marine corridors, allowing open-sea marine reptiles such as ichthyosaurs, plesiosaurs and crocodyliformes to spread out over large distances. As an example, similar marine reptile faunas are known from the Jurassic of Europe and southern South America, as a result of dispersion events via the Hispanic Corridor that connected the Tethys / North Atlantic and Pacific realms at this time. During the Cretaceous, and notably with the expansion of the Atlantic Ocean, most of these reptiles were cosmopolite and open-sea forms (plesiosaurs, mosasaurid squamates, chelonioid turtles). However, even if large faunal interchanges were possible, some provinces such as the Northern and Southern margins of the Tethys were characterized by a peculiar faunal identity, notably concerning mosasaurids, despite the apparent absence of barriers. So, if Continental Drift enabled circulation and faunal interchanges, other parameters such as ecological constraints probably also played a role in the distribution of these marine reptile faunas. [less ▲]

Detailed reference viewed: 164 (2 ULg)
Full Text
See detailThe Uranus System Explorer (USE) – Unveiling the evolution and formation of icy giants
Costa, Marc; Nordheim, Tom; Provinciali, Lorenzo et al

Conference (2012, September)

The results presented are the output of a student exercise carried out at the Alpbach Summer School 2012 , the topic of which pertained to the exploration of the giant planets and their systems. In this ... [more ▼]

The results presented are the output of a student exercise carried out at the Alpbach Summer School 2012 , the topic of which pertained to the exploration of the giant planets and their systems. In this context, we propose in this paper the Uranus System Explorer (USE), a mission to investigate the Uranus planetary system and gain new insight into the formation and evolution of icy giants. [less ▲]

Detailed reference viewed: 110 (22 ULg)
See detailQuelle qualité de l'enseignement en ligne et quels partages possibles ?
Poumay, Marianne ULg

Conference (2012, September)

Ce forum a pour objectif de présenter les technologies de demain qui permettront aux hommes de mieux vivre ensemble dans les domaines de la santé, des transports, de la culture, de l'éducation et de l ... [more ▼]

Ce forum a pour objectif de présenter les technologies de demain qui permettront aux hommes de mieux vivre ensemble dans les domaines de la santé, des transports, de la culture, de l'éducation et de l'environnement. [less ▲]

Detailed reference viewed: 31 (0 ULg)
Peer Reviewed
See detailDistribution and identification of molecular interactions between tomato roots and bacterial biofilms
Debois, Delphine ULg; Jourdan, Emmanuel ULg; Smargiasso, Nicolas ULg et al

Conference (2012, September)

Some non pathogenic microorganisms evolving in the root micro-environment can trigger a positive effect on plant, increasing host defense against disease or/and directly inhibiting growth of pathogen in ... [more ▼]

Some non pathogenic microorganisms evolving in the root micro-environment can trigger a positive effect on plant, increasing host defense against disease or/and directly inhibiting growth of pathogen in soil (1). To initiate both phenomena leading to biocontrol activity, microorganisms use plant exudates to grow on roots and to produce in-situ active compounds. In Bacilli, cyclic lipopeptides of the surfactin, iturin and fengycin families represent important antibiotics involved in biocontrol (2). Recent studies in microbiology allowed a better understanding of plant microorganism interactions but few has been done at the molecular level. In this study, MALDI MS imaging has been used to study the nature of the secreted lipopeptide molecules, their relative quantity and their distribution in the root’s environment. Disinfected tomato seeds were first germinated at 28°C in sterile conditions for germination. Seedlings were then placed in Petri dish on ITO glass slide recovered with a thin layer of plant nutritive solution (Hoagland) containing 1,75% of agar and treated with freshly-grown cells of Bacillus amyloliquefaciens S499. Petri dishes were finally incubated vertically in phytotron at 28°C with a 16h photoperiod. Different root age / time of incubation were studied: 13 / 3; 13 / 7; 21 / 14 and 39 / 32. Control tomato root (without bacterial treatment) of the same ages were also analyzed (13 / 0; 21 / 0 and 42 / 0. For MALDI imaging experiments, the ITO slide was removed from the agar and dried in a dessiccator under vacuum. The matrix solution (α-cyano-hydroxycinnamic acid, 5mg/mL in ACN/0.2% TFA 70/30) was applied with an ImagePrep automated sprayer (Bruker Daltonics). An UltraFlex II TOF/TOF and a Solarix FT-ICR mass spectrometers were used to record molecular cartographies. The average mass spectra recorded around the tomato root (2-3 mm on both sides of the root) showed that lipopeptides were major compounds detected on the agar. The relative intensity of lipopeptides families varied with respect to the age of the root/biofilm system. In the 13/3 system, 3 homologues of surfactins were essentially detected (C13, C14 and C15), with very few iturins and fengycins. Their localizations were identical, whatever the considered homologue. Then the production of iturin and fengycin families increases in older systems (13/7 and 21/14) and a novel homologue of surfactin is detected (C12). Some variations in localizations within families may be observed (around the root or at the close vicinity of it in function of the considered homologue or alkali adduct). Then for the oldest system we studied, iturins and fengycins are not detected anymore and the localization of surfactins is less precise. In the 39/32 system, we also detected unknown compounds at 986.6, 1000.6, 1014.7 and 1028.7 m/z. The mass range of these compounds allied to the mass difference between two consecutive ion peaks let us think that these unknown compounds could be a new lipopeptide family. Investigations are in progress to identify these new secondary metabolites of Bacillus amyloliquefaciens. [less ▲]

Detailed reference viewed: 64 (12 ULg)
Full Text
Peer Reviewed
See detailWaste management evolution through years: evaluation of improvement using Life Cycle Assessment methodology
Belboom, Sandra ULg; Renzoni, Roberto ULg; Digneffe, Jean-Marc et al

Conference (2012, September)

Waste is considered as a major concern of our century. New technologies and attempts to improve appeared through years. The goal of this study was to evaluate the improvement of waste management through ... [more ▼]

Waste is considered as a major concern of our century. New technologies and attempts to improve appeared through years. The goal of this study was to evaluate the improvement of waste management through the last forty years. Four steps of time and of technologies of waste treatment were evaluated in an environmental point of view using the life cycle assessment methodology. The first scenario is situated before 1970 with waste landfilling in an open dump without recuperation and valorization of gas. The second one considers the situation between 1990 and 2008 with a plant comprising grinding and sorting of waste to obtain refused derived fuel fraction (RDF) which was burnt in an incinerator, remaining waste being sent to sanitary landfill with recuperation and valorization of gas in electricity. The third one is the current one, in operation since 2009, with incineration of the whole of the residual municipal waste. The last scenario is about future considering the current installation and adding a biomethanation plant using the collected biodegradable fraction of household waste. This environmental evaluation was performed in accordance with the ISO standards 14040 and 14044 and the environmental impacts were calculated with the ReCiPe methodology. We modeled a specific plant situated in Liege using its technical and environmental reports to be as realistic as possible. Main result of this study is the improvement through years starting from the important environmental impact for the landfilling of waste in an open dump to an environmental gain for some categories with the current installation coupled with biomethanation. Global warming impact from the eighties was reduced by 9 in the years 1990-2008 and by 14 for the current scenario alone or coupled with a biomethanation plant. Some sensitivity analyses were used to evaluate the strength of assumptions with for example using a consequential LCA instead of an attributional one and modifying the electricity origin mix. An uncertainty analysis using Monte-Carlo method showed the robustness of our results. This study confirms the environmental improvement of technologies and emissions of waste management through years. [less ▲]

Detailed reference viewed: 100 (11 ULg)
Peer Reviewed
See detailQuand l’art parle des restructurations : au-delà du dévoilement, une forme d’expérimentation
Pichault, François ULg; Baujolin, Rachel; Schmidt, Géraldine et al

Conference (2012, September)

Detailed reference viewed: 57 (3 ULg)
Peer Reviewed
See detailProceedings of the 12th Nordic Steel Construction Conference
Li, Yongzhen; Rossi, Barbara ULg

Conference (2012, September)

Detailed reference viewed: 159 (4 ULg)
See detailDeformation pattern at the western tip of the Corinth Rift
Beckers, Arnaud ULg; Hubert, Aurelia ULg; Beck, Christian et al

Conference (2012, September)

The Gulf of Corinth in Greece is an active continental rift propagating westward toward the Aegean subduction zone. GPS data shows that deformation rate reaches a maximum of 15 mm/yr at its western tip ... [more ▼]

The Gulf of Corinth in Greece is an active continental rift propagating westward toward the Aegean subduction zone. GPS data shows that deformation rate reaches a maximum of 15 mm/yr at its western tip. The style of extension and strain distribution is well documented offshore in the eastern and central parts of the rift (Bell, 2009). At its most active western extremity, published offshore data is not sufficient to characterize the deformation pattern. High resolution seismic profiles were thus acquired in that region within the framework of the SISCOR project to improve our understanding of fault evolution, seismicity and to be able to construct mechanical models of deformation. Here we investigate the spatio-temporal pattern of the basin subsidence and deposition with sparker data acquired in November 2011. Active faults and correlative time horizons were first mapped. The stratigraphy was then correlated with the eustatic sea-level curve. This sequence stratigraphic interpretation is possible because there are strong glacial-interglacial variations in the depositional environment. In fact lacustrine conditions prevail within the gulf during glacio-eustatic lowstands and are characterized by low amplitudes seismic facies. So synrift sediment isopachs over the last 12 000 and 130 000 yrs could be produced. The interpreted data allow us to: (1) compare deformation pattern at the western tip of the Gulf with the more mature central and eastern part of the Rift; (2) constrain the pattern and the timing of deformation as well as rates of faulting. Reference Bell, R. E., McNeill, L. C., Bull, J. M., Henstock, T. J., Collier, R. E. L., & Leeder, M. R., 2009. Fault architecture, basin structure and evolution of the Gulf of Corinth Rift, central Greece. Basin Research, 21(6), 824-855. doi:10.1111/j.1365-2117.2009.00401.x [less ▲]

Detailed reference viewed: 94 (9 ULg)
Full Text
Peer Reviewed
See detailConstant 2-labelling of a graph
Gravier, Sylvain; Vandomme, Elise ULg

Conference (2012, September)

We introduce the concept of constant 2-labelling of a weighted graph and show how it can be used to obtain periodic sphere packing. Roughly speaking, a constant 2-labelling of a weighted graph is a 2 ... [more ▼]

We introduce the concept of constant 2-labelling of a weighted graph and show how it can be used to obtain periodic sphere packing. Roughly speaking, a constant 2-labelling of a weighted graph is a 2-coloring (black and white) of its vertex set which preserves the sum of the weight of black vertices under some automorphisms. In this manuscript, we study this problem on weighted complete graphs and on weighted cycles. Our results on cycles allow us to determine (r,a,b)-codes in Z^2 whenever |a-b|>4 and r>1. [less ▲]

Detailed reference viewed: 24 (4 ULg)
Peer Reviewed
See detailLight as a modulator of cognitive brain functions
Vandewalle, Gilles ULg

Conference (2012, September)

Detailed reference viewed: 23 (2 ULg)
Peer Reviewed
See detailAn attempt to date by OSL the implantation of megaliths : the case of the standing stones of Le Gâvre (France)
Blain, Sophie ULg; Guibert, Pierre; Cassen, Serge et al

Conference (2012, September)

Detailed reference viewed: 23 (0 ULg)
Peer Reviewed
See detailUn projet de promotion de la santé mentale : des actions élaborées avec une association d'usagers, partenaire du projet
Fond-Harmant, Laurence; Pull, Charles; Lerebourg, Annick et al

Conference (2012, September)

Detailed reference viewed: 92 (15 ULg)
See detailUNFOLDING SYNTHETIC PEPTIDES BY AFM AT THE SINGLE-MOLECULE LEVEL
Willet, Nicolas ULg; Hinterdorfer, Peter; lecommandoux, Sébastien et al

Conference (2012, September)

The aim of this study is to investigate the mechanochemical behavior of homopolypeptides able to change their conformation is a stimuli-responsive way. The peptidic secondary structures were studied in ... [more ▼]

The aim of this study is to investigate the mechanochemical behavior of homopolypeptides able to change their conformation is a stimuli-responsive way. The peptidic secondary structures were studied in detail by atomic force microscopy (AFM) at the single-molecule level. Synthetic copolymers containing a polypeptide block were prepared by N-carboxyanhydride amino acid ring-opening polymerization. The polymer chains were grafted as a dilute brush onto gold surfaces and their mechanochemical behavior was then studied by AFM single-molecule force spectroscopy (SMFS). The investigated polypeptide blocks were based on poly(L-glutamic acid), which undergoes a transition from alpha-helix to random coil. This can be induced by external stimuli (pH, ionic strength, temperature) or simply by applying a force. We were able to study the mechanically driven unfolding of the peptide by stretching-release cycles of the biomacromolecule. Stretching the helical peptide resulted in original features in the force-distance traces. Plateaus that are specific for the helical conformation were detected, quantified and discussed. Pulling-relaxing SMFS experiments will eventually lead to a better understanding of the force-induced unfolding of an alpha-helix and the reversibility of the phenomenon. [less ▲]

Detailed reference viewed: 49 (4 ULg)
See detailImaging Guided Proteomics Unveils Heterogeneity in Colorectal Carcinoma Liver Metastases – Implications for Targeted Therapies
Blomme, Arnaud ULg; Turtoi, Andrei ULg; Castronovo, Vincenzo ULg

Conference (2012, September)

Patients suffering from liver metastases are diagnosed late and have a poor outcome. Targeted therapies are promising treatment options, however the malignant lesions are heterogeneous in nature offering ... [more ▼]

Patients suffering from liver metastases are diagnosed late and have a poor outcome. Targeted therapies are promising treatment options, however the malignant lesions are heterogeneous in nature offering niches for cancer cells to survive and regrow. A rational strategy is needed to select targetable antigens that would overcome this intra-tumoral heterogeneity. MALDI-MS imaging is an emerging tool to study the distribution of biomolecules in tissue samples and is a good base for defining the regions of interest (ROI) that deserve further in-depth analysis. We employed MALDI-MS imaging of colorectal liver metastasis to identify ROI and guide the proteomic analysis for a more in-depth picture of modulated proteins. The focus was laid on cell membrane and extracellular proteins as these have enhanced potential to be used for targeted therapy and clinical imaging applications. Four defined ROI were further analyzed employing 2D-Nano-UPLC-MSe methodology. Over 1500 unique proteins were statistically divided into different patterns of expression, generating a quantitative picture of the proteome heterogeneity in liver metastases. The results offered insight into novel targets but also antigens against which the antibodies are already involved in cancer clinical trials. Following immunohistochemistry based validation experiments, certain proteins demonstrated the potential to homogeneously cover the metastatic lesion and become better targets. Two such antigens, LTBP2 and TGFBI were selected for in vivo functional/ tumor targeting studies in colorectal carcinoma animal model. Importantly, we were able to demonstrate the “targetable” nature of these antigens for homing antibodies injected i.v. Functionally, TGFBI showed an additional potential to target the tumor via it’s ability to affect migration and growth of cancer cells, hence taking the influence on the process of tumorigenesis. In conclusion, liver metastases display a significant heterogeneity in terms of targetable biomarkers and these findings should flow in the future development of targeted therapies aiming to cure the patient. [less ▲]

Detailed reference viewed: 37 (9 ULg)
Full Text
Peer Reviewed
See detailZelfbehandeling van frequente hoofdpijn : een Belgische apotheekstudie
Mehuys, E; Paemeleire, K; Van Hees, Thierry ULg et al

Conference (2012, September)

Detailed reference viewed: 25 (16 ULg)
Full Text
Peer Reviewed
See detailCestodes and Acanthocephalans parasitizing small mammals from Benin
Houemenou, Gualbert; Martin-Alonso, A.; Sanchez, S. et al

Conference (2012, September)

Detailed reference viewed: 30 (0 ULg)
See detailRevision of the Annex VI of the Regulation (EC) n° 152/2009
Lecrenier, Marie-Caroline ULg; Veys, Pascal; Berben, Gilbert et al

Conference (2012, September)

Detailed reference viewed: 12 (2 ULg)
See detailOntogenesis of kisspeptin neurons: from neurogenesis to adulthood
Desroziers, Elodie ULg; Droguerre, Marine; Bentsen, A.H et al

Conference (2012, September)

Detailed reference viewed: 10 (0 ULg)
Peer Reviewed
See detailMANAGING PUBLIC ORDER DURING
Schoenaers, Frédéric ULg; Vincent, Jeffrey; Easton, Marleen et al

Conference (2012, September)

Detailed reference viewed: 40 (5 ULg)
Full Text
Peer Reviewed
See detailThe role of disorder in the mechanical control of trabecular bone as a cellular solid structure
Ruffoni, Davide ULg; Maurer, Manfred; Weinkamer, Richard et al

Conference (2012, September)

Detailed reference viewed: 16 (1 ULg)
See detailFunctional degradable polymers for advanced drug delivery systems
Cajot, Sébastien; Riva, Raphaël ULg; Jérôme, Christine ULg

Conference (2012, September)

Nowadays, polymer micelles have attracted an increasing interest in pharmaceutical research because they could be used as efficient drug delivery systems. Micelles of amphiphilic block copolymers are ... [more ▼]

Nowadays, polymer micelles have attracted an increasing interest in pharmaceutical research because they could be used as efficient drug delivery systems. Micelles of amphiphilic block copolymers are supramolecular core-shell type assemblies of several tens of nanometers in diameter. In principle, the micelle core is usually constructed with biodegradable hydrophobic polymers such as aliphatic polyesters, e.g. poly(ε-caprolactone) (PCL), which serves as a reservoir for the incorporation of various lipophilic drugs. Water soluble poly(ethylene oxide) (PEO) is most frequently used to build the micelle corona because it is very efficient in preventing protein adsorption at surfaces and in stabilizing micelles in the blood compartment, making particles invisible to the body defense system. Even if micelles get a high stability in aqueous media thanks to their low critical micellar concentration, micelle dissociation is not always preserved when they are injected in the blood compartment. A way to provide the micelle stability during their administration is to cross-link them. Different kinds of cross-linked micelles can be investigated depending on the localization of the cross-linking. Shell cross-linked micelles or nanocage structures with a degradable core have the great advantage to reach drug encapsulation with a high loading rate. However, cross-linking the hydrophilic shell may affect the stealthiness of the carrier. Thus, we have designed reversibly cross-linked micelles by introducing the cross-linking bridges in the hydrophobic segment of the block copolymer, rather than in the hydrophilic one, leading so to more internal cross-linking and thus preserving the mobility of the hydrophilic segment. Three different localizations of the cross-linking has been targeted; (i) loose core cross-linking of a core-corona system, (ii) tight core cross-linking of a core-shell-corona system (the shell and the core being both hydrophobic and the corona hydrophilic) and (iii) tight shell cross-linking of a similar core-shell-corona system. To reach this goal, three types of amphiphilic copolymers have been used bearing pendent azide groups in the hydrophobic segment. These copolymers have been obtained by starting the ring-opening polymerization of ε-CL and a functional CL, either as a mixture or sequentially from a poly(ethylene oxide) macroinitiator leading to the three targeted architectures. The azide groups located along the PCL backbone have then been used to cross-link the micelles by the Huisgens cycloaddition with a bis-alkyne cross-linker. The choice of this cross-linker has also taken into account the requirement to make the cross-linking reversible. For that purpose, disulfide bridges have been selected in order to impart reversibility to the cross-linking by intracellular reduction. Indeed, the marked concentration difference of glutathione between extra- and intra-cellular environments has already been used to trigger drug release by intracellular disulfide bond cleavage. Accordingly, a bis-alkyne disulfide molecule has been chosen as cross-linker. The micellization and cross-linking of these amphiphilic azido macromolecules have been studied. The reversibility of the cross-linking in reductive environment and the cross-linked micelles stealthiness have been tested. [less ▲]

Detailed reference viewed: 48 (1 ULg)
See detailComment créer ou maintenir la motivation des étudiants en Haute Ecole ?
Poumay, Marianne ULg

Conference (2012, September)

Detailed reference viewed: 52 (9 ULg)
Full Text
See detailSPICAM dayglow measurements: a tool to retrieve CO2 vertical density profile and exospheric temperatures
Stiepen, Arnaud ULg; Gérard, Jean-Claude ULg; Bougher, S. et al

Conference (2012, September)

We analyze the behavior of the CO2+ and CO Cameron ultraviolet dayglow in the atmosphere of Mars through a large dataset of dayside grazing limb observations performed by the Spectroscopy for ... [more ▼]

We analyze the behavior of the CO2+ and CO Cameron ultraviolet dayglow in the atmosphere of Mars through a large dataset of dayside grazing limb observations performed by the Spectroscopy for Investigation of Characteristics of the Atmosphere of Mars (SPICAM) on board the Mars Express spacecraft. Limb profiles are studied to retrieve the temperature of the Martian exosphere and its variability with season, latitude and solar activity. We use a one-dimensional chemical-diffusive model to retrieve the main features of the emissions and constrain the temperature and density vertical profiles of the main components of the Martian atmosphere. [less ▲]

Detailed reference viewed: 58 (4 ULg)
Peer Reviewed
See detailLes carrières professionnelles des cadres : regard croisé du genre et de l'âge
Grodent, Françoise ULg; Cornet, Annie ULg

Conference (2012, September)

Ce papier a pour objectif de réaliser une revue de littérature qui doit permettre de construire une recherche empirique visant à apporter une vision comparative des carrières des hommes et des femmes ... [more ▼]

Ce papier a pour objectif de réaliser une revue de littérature qui doit permettre de construire une recherche empirique visant à apporter une vision comparative des carrières des hommes et des femmes cadres en regard de trois groupes d’âge : les moins de 35 ans, les [35-50] ans et les plus de 50 ans. Nous considérons les deux sexes étant donné que les trajectoires professionnelles sont influencées par le sexe de la personne ainsi que par les stéréotypes et les rôles qui y sont directement associés (genre). Les générations, quant à elles, nous permettront de tenir compte de l’évolution des facteurs de contexte que sont notamment ces rôles attribués au masculin et au féminin à travers les époques. En effet, les constructions sociales liées au sexe des individus sont susceptibles de changer d’une génération à l’autre et donc d’agir distinctement sur les intentions de carrière. Le fait d’introduire la dimension générationnelle, en plus de celle du genre, est l’occasion d’aborder le concept d’intersectionnalité qui consiste en un croisement des groupes cibles propres à la gestion de la diversité. A l’issue de cet aperçu théorique faisant état de la littérature existante relative à cette thématique des carrières des individus occupant un poste à responsabilités, nous pourrons mettre en évidence différentes questions de recherche qu’il nous faudra, dans un second temps, confronter à la réalité du terrain. [less ▲]

Detailed reference viewed: 244 (32 ULg)
Full Text
See detailSuccessions internationales - panorama des difficultés dans les relations belgo-allemandes
Wautelet, Patrick ULg

Conference (2012, September)

Cette présentation fait le point sur les difficultés que présent le cadre juridique en vigueur actuellement dans les relations belgo-allemandes en matière successorale, pour mieux illustrer l'impact qu ... [more ▼]

Cette présentation fait le point sur les difficultés que présent le cadre juridique en vigueur actuellement dans les relations belgo-allemandes en matière successorale, pour mieux illustrer l'impact qu'aura le Règlement succession dont l'entrée en vigueur est prévue en 2015. [less ▲]

Detailed reference viewed: 83 (7 ULg)
Full Text
Peer Reviewed
See detailEffectiveness of pharmaceutical care for patients with COPD (PHARMACOP) : A randomized controlled trial
Tommelein, E; Mehuys, E; Van Hees, Thierry ULg et al

Conference (2012, September)

Detailed reference viewed: 16 (1 ULg)
Peer Reviewed
See detailLes fondements économiques de la motivation des sanctions
Sibony, Anne-Lise ULg

Conference (2012, September)

Il existe une approche économique des sanctions. Les économistes proposent ainsi des théories ou des modèles de sanctions qui permettent de calculer la sanction optimale en fonction d'un certain nombre de ... [more ▼]

Il existe une approche économique des sanctions. Les économistes proposent ainsi des théories ou des modèles de sanctions qui permettent de calculer la sanction optimale en fonction d'un certain nombre de paramètres considérés comme pertinents. Cette contribution explore les possibilité pour les juridiction d'emprunter à ces approches économiques lorsqu'elles doivent imposer des sanctions et en motiver le quantum. [less ▲]

Detailed reference viewed: 72 (6 ULg)
Full Text
See detailPower line dynamic rating: forecasting potential period of low wind speed is crucial
Nguyen, Huu-Minh ULg; Doutreloup, Sébastien; Erpicum, Michel ULg et al

Conference (2012, September)

The replacement and building of new electrical power lines (50 000 km in Europe) can’t cope with the growth of RES development in EU for the ten upcoming years. New solutions have to be found to manage ... [more ▼]

The replacement and building of new electrical power lines (50 000 km in Europe) can’t cope with the growth of RES development in EU for the ten upcoming years. New solutions have to be found to manage such power transmission needs. Dynamic Line Rating (DLR) systems are part of the global solution. They allow to increase the power line capacity by an average 20% over the static rating (which is defined as the maximum current-carrying capacity as designed). The ampacity or thermal rating, is calculated thanks to (i) sensors installed directly on the power line conductors, like Ampacimon, (ii) weather data, and (iii) standard thermal models (IEEE, CIGRE). However, in order to be fully effective and to allow an efficient use of assets, ampacity calculation in real-time is not enough; it has to be forecasted as well. Beyond 6h-forecast, weather forecasts are necessary to compute the line ampacity up to two days ahead, as needed by network operation. As wind convection has a major impact on conductor cooling, even low wind speeds (2m/s up to 5m/s) allow a huge ampacity increase (the actual rating can be doubled). Therefore, low wind speed forecast up to 2-days ahead finds a major application in dynamic rating of overhead transmission and distribution lines. [less ▲]

Detailed reference viewed: 312 (40 ULg)
Peer Reviewed
See detailIgE antibodies critically contribute to acquired enhanced resistance to honeybee venom in mice
Marichal, Thomas ULg; Starkl, Philipp; Reber, Laurent L. et al

Conference (2012, September)

Detailed reference viewed: 25 (0 ULg)
Peer Reviewed
See detailPredictive models for strength enhancements in cold-formed structural sections
Rossi, Barbara ULg; Afshan, Sheida; Gardner, Leroy

Conference (2012, September)

Detailed reference viewed: 11 (0 ULg)
Peer Reviewed
See detailFusion alpha and proton diagnostics by thin layer activation
Chene, Grégoire ULg; Bonheure, George; Delhalle, René ULg et al

Conference (2012, September)

Detailed reference viewed: 29 (2 ULg)
Peer Reviewed
See detailThe diversification of early eukaryotes
Javaux, Emmanuelle ULg

Conference (2012, September)

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailThe OUFTI-1 nanosatellite system in mid-2012: architectures of ground and space segments
Denis, Amandine ULg; Pisane, Jonathan ULg; Crosset, Nicolas ULg et al

Conference (2012, September)

We describe the current status of the OUFTI-1 nanosatellite project, the main payload of which is an innovative D- STAR radiocommunication system. We describe the architectures of the ground and space ... [more ▼]

We describe the current status of the OUFTI-1 nanosatellite project, the main payload of which is an innovative D- STAR radiocommunication system. We describe the architectures of the ground and space segments. [less ▲]

Detailed reference viewed: 64 (21 ULg)
See detailA severe drop in Eurasian ichthyosaur diversity prior to their late Cenomanian extinction: local or global signal?
Fischer, Valentin ULg

Conference (2012, September)

During the last decade, our knowledge of the taxonomic diversity of the Early Cretaceous ichthyosaurs (Mesozoic marine reptiles) has increased significantly, with the recognition of new species, genera ... [more ▼]

During the last decade, our knowledge of the taxonomic diversity of the Early Cretaceous ichthyosaurs (Mesozoic marine reptiles) has increased significantly, with the recognition of new species, genera, and subfamilies from Canada, Europe, and Russia. New data from England, France, and western Russia suggest ichthyosaurs remained diverse and abundant in western Eurasian marine ecosystems up to the late Albian–early Cenomanian, with the co-occurrence of three to four taxa occupying two to three distinct ecological niches in each formation considered (Cambridge Greensand Member, England; Marnes Bleues Formation, France; Stoïlensky quarry, Russia). However, the overlying formations (middle–late Cenomanian), consisting of chalk or glauconiferous sands, have yielded a very depauperate ichthyosaur fauna. These ichthyosaur assemblages are monospecific and comprise medium to large-sized, presumably opportunistic predators belonging the genus Platypterygius. This suggests a severe drop in ichthyosaur diversity some 5 millions years before their final extinction, which presumably occurred at or near the Cenomanian–Turonian boundary. However, it is difficult to know if this pattern is biased or genuine: the diversity drop may very well be an effect of preservational/ecological biases as well as a genuine extinction linked to the profound environmental changes occurring during the Cenomanian. The presence of similar impoverished assemblages in Cenomanian sediments worldwide favours the latter hypothesis, but the question remains open for now. [less ▲]

Detailed reference viewed: 73 (5 ULg)
Peer Reviewed
See detailTowards an integrative model of short-term memory : the A-O-STM framework.
Majerus, Steve ULg

Conference (2012, September)

Detailed reference viewed: 16 (1 ULg)
Full Text
See detailVenus O2 night glow observations with VIRTSI/Venus Express
Migliorin, Alessandra; Piccioni, Giuseppe; Gérard, Jean-Claude ULg et al

Conference (2012, September)

Detailed reference viewed: 15 (2 ULg)
Full Text
Peer Reviewed
See detailDioxin Food Crises and New POPs: Challenges in Analyses
Focant, Jean-François ULg

Conference (2012, September)

Detailed reference viewed: 28 (0 ULg)
See detailDermatosparaxis : altered processing of type I procollagen by ADAMTS2 and beyond.
Colige, Alain ULg

Conference (2012, September)

Detailed reference viewed: 12 (0 ULg)
Full Text
Peer Reviewed
See detailHow does engagement in reading predict digital reading proficiency among 15 year-olds?
Lafontaine, Dominique ULg; Monseur, Christian ULg; Baye, Ariane ULg

Conference (2012, September)

In PISA 2009, 19 countries took part to an optional assessment of digital reading. In each country, a subsample of 15 year-olds was administered not only the paper and pencil PISA test, but also different ... [more ▼]

In PISA 2009, 19 countries took part to an optional assessment of digital reading. In each country, a subsample of 15 year-olds was administered not only the paper and pencil PISA test, but also different reading tasks online. The aim of our study is to investigate the relationships between engagement in reading, especially online reading practices, and digital reading proficiency of 15 year-olds in the 11 European countries which took part to this option (11 out of 19). [less ▲]

Detailed reference viewed: 79 (6 ULg)
Peer Reviewed
See detailReading the plant fossil record through taxonomic survivorship curves
Cascales - Miñana, Borja ULg; Cleal, Christopher J.

Conference (2012, September)

Detailed reference viewed: 15 (0 ULg)
See detailHepatitis E virus infection in domestic swine, wild boar and human in Belgium
Thiry, Damien ULg; Mauroy, Axel ULg; Brochier, Bernard et al

Conference (2012, September)

Detailed reference viewed: 9 (1 ULg)
Full Text
Peer Reviewed
See detailGrétry moraliste et mémorialiste
Daubercies, Laurence ULg

Conference (2012, September)

Detailed reference viewed: 5 (0 ULg)
Full Text
Peer Reviewed
See detailLa perception de la pénibilité au travail dans les métiers du social
Dubois, Valérie ULg; Cornet, Annie ULg

Conference (2012, September)

Detailed reference viewed: 103 (15 ULg)
Full Text
See detailEvaluation sommaire du dispositif de formation initiale à l'ULg et pistes d'amélioration.
Simons, Germain ULg

Conference (2012, August 31)

Dans cette communication, nous présentons d'abord le dispositif de formation initiale des enseignants du secondaire supérieur dans la Fédération Wallonie-Bruxelles. Ensuite, nous épinglons quelques points ... [more ▼]

Dans cette communication, nous présentons d'abord le dispositif de formation initiale des enseignants du secondaire supérieur dans la Fédération Wallonie-Bruxelles. Ensuite, nous épinglons quelques points forts et problèmes liés à cette formation. Enfin, nous proposons des pistes de solutions pour optimiser le dispositif actuel. [less ▲]

Detailed reference viewed: 40 (9 ULg)
Full Text
Peer Reviewed
See detailDevelopment and Identification of a Closed-Loop Model of the Cardiovascular System Including the Atria
Pironet, Antoine ULg; Revie, James A.; Paeme, Sabine ULg et al

Conference (2012, August 31)

Detailed reference viewed: 62 (6 ULg)
Full Text
See detailExemple d'un dispositif de formation basé sur l'accompagnement réflexif de la pratique : le CAPAES en langues modernes à l'ULg
Simons, Germain ULg

Conference (2012, August 31)

Après avoir brièvement décrit le contexte général du CAPAES en FWB, nous présentons le dispositif de formation en didactique professionnelle des langues modernes à l'ULg, en nous concentrant ... [more ▼]

Après avoir brièvement décrit le contexte général du CAPAES en FWB, nous présentons le dispositif de formation en didactique professionnelle des langues modernes à l'ULg, en nous concentrant principalement sur l'accompagnement individualisé des étudiants-enseignants assisté par la vidéo (autoscopie). Nous fournissons ensuite quelques éléments d'évaluation de ce dispositif de formation basés sur nos observations et sur deux types d'enquêtes (questionnaires et entretiens semi-structurés). Enfin, sur la base de cette évaluation croisée, nous proposons quelques pistes pour optimiser le dispositif actuel. [less ▲]

Detailed reference viewed: 55 (8 ULg)
Full Text
See detailSymmetries in the three-Higgs-doublet model
Ivanov, Igor ULg

Conference (2012, August 31)

Detailed reference viewed: 13 (2 ULg)
Peer Reviewed
See detailThe role of distinctiveness in person recognition from faces and voices
Barsics, Catherine ULg; Brédart, Serge ULg

Conference (2012, August 30)

Objectives: When we recognize a familiar person, we can retrieve different kinds of information about her/him: semantic information (e.g. the person’s occupation), episodic information, such as a memory ... [more ▼]

Objectives: When we recognize a familiar person, we can retrieve different kinds of information about her/him: semantic information (e.g. the person’s occupation), episodic information, such as a memory of a specific occasion on which this person has previously been encountered and lexical information (i.e. the name). Recent findings indicated that semantic and episodic information retrieval is more likely to be elicited following familiar face than voice recognition. The present study was designed in order to explore the potential role of stimulus distinctiveness as an underlying factor of the face advantage. Design: The design included two within-subject factors: the stimulus domain (faces or voices) and the stimulus distinctiveness (distinctive or typical). Methods: The proportions of episodic and semantic information recalled following the recognition of famous faces and voices was assessed, using an adapted version of the Remember/Know paradigm. Results: In line with earlier results, more semantic and episodic information was retrieved from faces than voices. Moreover, semantic information was better retrieved from distinctive than typical stimuli. Nonetheless, distinctiveness impacted less than domain on the recall of semantic information, since more semantic details were retrieved from typical faces than from distinctive voices. Conclusions: These results are discussed in the light of current models of person recognition. [less ▲]

Detailed reference viewed: 45 (6 ULg)
Full Text
Peer Reviewed
See detailAccompaniment - a professional care?
Pirard, Florence ULg

Conference (2012, August 30)

In the European contexts where the structure of service supply is divided and where the initial trainings of professionals of childcare services are inaccurate (low levels, a focus on medical approach ... [more ▼]

In the European contexts where the structure of service supply is divided and where the initial trainings of professionals of childcare services are inaccurate (low levels, a focus on medical approach without adopting a more global psycho-educational view, etc.), several ways of professional developments could be considered as « professional care». The case of the Brussels-Wallonia Federation shows the importance of educational orientations for all services (for children between 0-12 years) thanks to curricula understood as tools of professionalization (rather than of standardization) (OCED, 2001, 2006, 2012). The case also illustrates the necessity to have a comprehensive set of coordinated actions of professional accompaniment for several years (Pirard, 2011; Pirard, Barbier, 2012). This accompaniment could be considered as a «professional care» that acknowledges the process of individual and collective competencies growing when certain conditions are guaranteed (Urban, al., 2011). [less ▲]

Detailed reference viewed: 17 (0 ULg)
Full Text
See detailEstimation of genetic parameters for longitudinal measurements of feed intake in Piétrain sire lines
Dufrasne, Marie ULg; Jaspart, Véronique; Wavreille, José et al

Conference (2012, August 30)

The aim of this study was to estimate the genetic parameters for longitudinal measurements of feed intake (FI) in a crossbred population of pigs to develop a genetic evaluation model for the estimation of ... [more ▼]

The aim of this study was to estimate the genetic parameters for longitudinal measurements of feed intake (FI) in a crossbred population of pigs to develop a genetic evaluation model for the estimation of breeding values for FI of Piétrain boars. Data were collected on crossbred pigs in test station in the context of the genetic evaluation system of Piétrain boars in the Walloon Region of Belgium. Trait analyzed was daily FI (DFI). Because there were no facilities to record individual DFI in the Walloon test station, individual DFI were assumed to be the total pen FI divided by the number of pigs per pen. The edited dataset consisted of 3,902 measurements of DFI recorded on 1,975 crossbred pigs from 75 purebred Piétrain sires and 150 Landrace dams from the hyperprolific Landrace K+ line. A random regression animal model with fixed effects of sex and pen, and random effects of additive genetic, permanent environment and residual was developed in this study. Random additive genetic and permanent environment effects were modeled with linear splines with knots located at 75, 100, 175 and 210 d. The mean DFI was 1.979 kg/d with a SD of 0.479 kg/d. Estimated heritability for DFI increased with age from 0.02 at 75 d to 0.30 at 210 d. Estimated genetic correlation between age decreased when age interval increased. These preliminary results are consistent with literature. However, additional research are ongoing to test alternative random regression models that should be better than using splines for longitudinal performance of DFI. Furthermore, genetic relationship between DFI and other production traits, like growth and carcass traits, must be analyzed. [less ▲]

Detailed reference viewed: 31 (6 ULg)
Full Text
Peer Reviewed
See detailWhat does participation mean for children aged under 3?
Camus, Pascale ULg

Conference (2012, August 29)

Research has shown that quality provisions (0-6) can have a positive effect on children’s development (Unicef, 2008, Nesse, 2009, EACA, 2009). In 1992, Belgium has ratified the Convention on the rights of ... [more ▼]

Research has shown that quality provisions (0-6) can have a positive effect on children’s development (Unicef, 2008, Nesse, 2009, EACA, 2009). In 1992, Belgium has ratified the Convention on the rights of the Child that mentions each child has the right to express his opinion, to be heard in all matters that concern his life. More globally rights to take part, to “participate” have been recognized to every child since birth. But the obstacles to give a voice to children who are often considered as having any are numerous: the risk to consider them like an “object” of care is higher when the children are under 3. The workshop has proposed to explore and question the nature and the extent of participation for those children that are taken care in ECEC services (out of their families). What has been central was questioning participation of little ones, proposing an analysis of selected literature, discussions on how to sustain professionals to see children as actors in everyday life. [less ▲]

Detailed reference viewed: 192 (1 ULg)
Full Text
Peer Reviewed
See detailThermochemical conversion routes of lignocellulosic biomass
Gerbinet, Saïcha ULg; Léonard, Angélique ULg

Conference (2012, August 28)

The thermo-chemical route, especially the gasification process is considered. This process converts carbonaceous biomass into combustible gas (CO, H2, CO2, CH4 and impurities) called syngas and this ... [more ▼]

The thermo-chemical route, especially the gasification process is considered. This process converts carbonaceous biomass into combustible gas (CO, H2, CO2, CH4 and impurities) called syngas and this syngas can be converted into a large range of products. Production of four of these compounds is specifically investigated: ethylene, propylene, diesel and DME. Diesel can be produced via a Fischer-Tropsch process, whereas DME (dimethyl ether) can be obtained directly or from methanol which is obtained from syngas. DME and diesel can serve as fuels in traditional motors. Syngas can also be used to produce ethylene and propylene, two building blocks for the chemical industry. An important bibliography study has been done to understand these processes in order to evaluate their environmental impacts. The Life Cycle Assessment (LCA) methodology will be used in this regard. A bibliography study on the LCA articles published in this filled has been performed and it appears that few studies have yet focused on the environmental impacts of the gasification process and production of biofuels. Most of the time, they do not use the LCA methodology or they do not take into account land use change impact and are only “well-to-tank” studies. Moreover, it seems that the production of building blocks for the chemical industry has never been investigated. During the next stages of this work, the best conversion routes of lignocellulosic biomass, in an environmental sense, will be determined. Gasification will also be compared with the fossil sector and the results will be checked by sensitivity and uncertainty analyses. The economic aspect will also be taken into account, for the better process, in an environmental view. So, the results of the full study will be a decision making tool for the industries involved in biomass valorisation and for governments. [less ▲]

Detailed reference viewed: 109 (4 ULg)
Full Text
See detailInteraction between the antifungal lipopeptide fengycin and lipid membrane
Deleu, Magali ULg; Nylander, Tommy

Conference (2012, August 28)

Detailed reference viewed: 37 (3 ULg)
Full Text
See detailNaar de film? Ja, maar in het Nederlands of in het Vlaams?
Perrez, Julien ULg; Neven, Anneke

Conference (2012, August 28)

Detailed reference viewed: 56 (4 ULg)
Full Text
See detailAlternative single-step type genomic prediction equations
Gengler, Nicolas ULg; Nieuwhof, G.J.; Konstantinov, K.V. et al

Conference (2012, August 28)

Current derivations of single-step equations are based on modified relationships among animals replacing for genotyped animals and on an inverted scale, pedigree based relationships, by modified ones ... [more ▼]

Current derivations of single-step equations are based on modified relationships among animals replacing for genotyped animals and on an inverted scale, pedigree based relationships, by modified ones. These relationships are obtained as linear combination of strictly genomic and pedigree based relationships, therefore implicitly 'weighting' SNP and polygenic effects. Alternative equations were recently proposed de-absorbing the genomic relationships out of the equations. This derivation did not change basic assumptions, but was derived using a matrix of relationship differences. This presentation will show a new and alternative derivation of single-step type genomic prediction equations allowing joint estimation of GEBV and SNP effects based on the partitioning of genetic (co)variances. The method was derived from a random mixed inheritance model where SNP and residual polygenic effects are jointly modeled. The derived equations were modified to allow non-genotyped animals and to estimate directly and jointly GEBV and SNP effects. Equations resemble superficially recently proposed alternative single-step equations but were derived differently and are based on completely different assumptions. They also avoid certain issues in de-absorbing derivation linked to the matrix of relationship differences by using (co)variances. Several other advantages of the new equations are that weighting of SNP and polygenic effects becomes explicitly and that SNP effects are also estimated. This method makes better use of High-Density SNP panels and can be easily modified to accommodate other genetic effects as major gene effects or copy-number variant based effects. Finally these alternative equations combine advantages of single-step and of explicit SNP effect estimation based methods. Additional research is required to test and validate further the proposed method. [less ▲]

Detailed reference viewed: 121 (40 ULg)
Full Text
See detailMid-infrared prediction of milk titratable acidity and its genetic variability in first-parity cows
Colinet, Frédéric ULg; Vanlierde, Amélie ULg; Vanden Bossche, sandrine ULg et al

Conference (2012, August 27)

Coagulation of milkhas a direct effect on cheese yield. Among several parameters, titratable acidity of milk (TA) influences all the phases of milk coagulation. In order to study the genetic variability ... [more ▼]

Coagulation of milkhas a direct effect on cheese yield. Among several parameters, titratable acidity of milk (TA) influences all the phases of milk coagulation. In order to study the genetic variability of this trait on a large scale, mid-infrared (MIR) chemometric methods were used to predict TA. A total of 507 milk samples collected in the Walloon Region of Belgium from individual cows were analyzed using a MIR spectrometer. TA was recorded as Dornic degree. An equation to predict TA from milk MIR spectrum was developed using partial least squared regression after a first derivative pre-treatment applied to the spectra to correct the baseline drift. During the calibration process, 45 outliers were detected and removed from the calibration set. The TA mean of the final calibration set was 16.62 (standard deviation (SD) = 1.80). The coefficient of determination (R²) was 0.82 for the calibration with a standard error (SE) of 0.76. A cross-validation (cv) was performed (R²cv = 0.81 with SEcv = 0.80). This equation was then applied on the spectral database generated during the Walloon routine milk recording. The variances components were estimated by REML using single-trait random regression animal test-day model. The dataset used included 33,717 records from 9,191 Holstein first-parity cows; the TA mean was 17.05 (SD = 1.35) and TA ranged from 12.83 to 20.87. Estimated daily heritabilities ranged from 0.43 at 5th day in milk to 0.59 at 215th day in milk indicating potential of selection. Further research will study phenotypic and genetic correlations between TA and milk production traits. [less ▲]

Detailed reference viewed: 111 (40 ULg)
Full Text
Peer Reviewed
See detailChoosing an aphid partner: a matter of taste and smell
Detrain, Claire; Fischer, Christophe ULg; Lognay, Georges ULg et al

Conference (2012, August 27)

Honeydew is the keystone upon which ants and aphids build their mutualistic relationship. We have investigated how sugar and volatile compounds from honeydew are involved in the discovery, the recognition ... [more ▼]

Honeydew is the keystone upon which ants and aphids build their mutualistic relationship. We have investigated how sugar and volatile compounds from honeydew are involved in the discovery, the recognition and the exploitation of aphid colonies by the black garden ant Lasius niger. In addition to semiochemicals produced by aphids, honeydew volatile compounds are used by ant scouts to orient themselves and distantly recognize myrmecophilous species. Once discovered, aphid colonies producing sugars which are the most beneficial to the ants are preferentially tended. In this respect, the ways each sugar acts upon the feeding behavior of ant foragers and triggers the laying of a recruitment trail are essential to understand how their collective exploitation of aphid colonies proceeds and why mutualistic interactions between ants and aphids are maintained. Sensitivity of ant scouts to honeydew sugars was also investigated. Dose-response curves revealed between-sugar differences with foragers being very sensitive even to small amounts of melezitose, a sugar specifically produced by aphid colonies. We discuss about the relevance of honeydew cues used by ants in the selection of sugary resources, the recognition of their honeydew-producing partners as well as in the assessment of size and nutritive value of exploited aphid colonies. [less ▲]

Detailed reference viewed: 70 (9 ULg)
Full Text
See detailGenetic variance in environmental sensitivity for milk and milk quality in Walloon Holstein cattle
Vandenplas, Jérémie ULg; Bastin, Catherine ULg; Gengler, Nicolas ULg et al

Conference (2012, August 27)

Animals that are robust to environmental changes are desirable in the current dairy industry. This difference in environmental sensitivity can be studied through the heterogeneity of residual variance ... [more ▼]

Animals that are robust to environmental changes are desirable in the current dairy industry. This difference in environmental sensitivity can be studied through the heterogeneity of residual variance while homogeneous residual variance between animals is usually assumed homogeneous in traditional genetic evaluations. The aim of this study was to study genetic heterogeneity of residual variance by the estimation of variance components in residual variance for 5 milk and milk quality traits. 146,027 test-day records from 26,887 Walloon Holstein first-parity cows in 747 herds were available. All cows had at least 3 records and had a known sire. These sires had at least 10 cows with records and each herd x test-day had at least 5 cows. Five traits, milk yield, somatic cell score, and content in milk (g/dL) of oleic acid (C18:1 cis-9), monounsaturated and unsaturated fatty acids, were analyzed separately. Estimation of variance components was performed by running iteratively Expectation Maximization-Restricted Maximum Likelihood algorithm by the implementation of double hierarchical generalized linear models. For all traits, the genetic standard deviation in residual variance (i.e. approximately the genetic coefficient of variation of residual variance) was low and ranged between 0.12 and 0.17. The standard deviations due to herd x test day and permanent environment in residual variance ranged between 0.35 and 0.44 for herd x test-day effect and between 0.55 and 0.96 for permanent environmental effect. This study shows the heterogeneity of residual variance and the existence of some genetic variance in environmental sensitivity for all studied traits in the Walloon Holstein dairy cattle. [less ▲]

Detailed reference viewed: 67 (15 ULg)
Full Text
See detailGenetics of the mineral contents in bovine milk predicted by mid-infrared spectrometry
Soyeurt, Hélène ULg; Dehareng, Frédéric; Romnée, Jean-Michel et al

Conference (2012, August 27)

Knowing the contents of minerals in milk like Ca or Na could be interesting to improve the nutritional quality of milk and to assess the animal health status. This study had two aims: 1) development of ... [more ▼]

Knowing the contents of minerals in milk like Ca or Na could be interesting to improve the nutritional quality of milk and to assess the animal health status. This study had two aims: 1) development of mid-infrared equations for mineral contents in milk by using an approach combining multiple countries, breeds, and production systems and 2) study of the genetic variability of these traits in the Walloon Holstein dairy cattle. Samples included in the calibration set were collected in Belgium, Luxembourg and France over 5 years. The calibration set included at least 400 samples analyzed by coupled plasma atomic emission spectrometry to quantify the contents of Na, Ca, Mg, P and K. The calibration coefficient of determination ranged between 0.69 for K and 0.93 for Na. The standard error of cross-validation was 63.35, 49.24, 64.33, 7.04, and 93.22 mg/kg of milk for Na, Ca, P, Mg and K. From these results, the quantification of milk minerals by mid-infrared is feasible. These equations were applied to more than 140,000 spectral records collected from 43,797 first parity Holstein cows in 1,233 herds. The variance components were estimated using Gibbs Sampling using single trait random regression models derived from the one used for the Walloon genetic evaluation of milk production traits. First results gave a daily heritability of 0.26 for Na, 0.45 for Ca, 0.48 for P, 0.46 for Mg, and 0.41 for K. Moderate negative genetic correlations were found between Na and the other studied traits. The highest correlation (0.69) was observed between P and Mg. These results confirmed the genetic variability of these traits. Further studies will be conducted to study the relationship between these traits and other traits (e.g., production, health). [less ▲]

Detailed reference viewed: 91 (16 ULg)
See detailLe nom et l’usage des lieux de l’habitation à Liège au XVIIIe siècle
Gilles, Isabelle ULg

Conference (2012, August 25)

L’histoire de l’architecture est aussi une histoire des mots. Pour peu que l’on s’y intéresse, le vocabulaire attribué à l’habitation, d’usage courant dans un espace temps donné, et le choix même des ... [more ▼]

L’histoire de l’architecture est aussi une histoire des mots. Pour peu que l’on s’y intéresse, le vocabulaire attribué à l’habitation, d’usage courant dans un espace temps donné, et le choix même des termes employés laissent transparaître une réalité historique parfois surprenante, souvent méconnue, toujours précieuse pour l’historien. Une étude menée sur le terrain liégeois du XVIIIe siècle, à travers des documents variés, manuscrits ou imprimés, textuels ou iconographiques, ajoute ainsi des saveurs à l’architecture qui s’y édifie. Le nom même donné à l’habitation peut déjà révéler toute sa consistance sociale. Ensuite, le terme attribué à chaque espace de l’habitation témoigne tantôt d’influences, le plus souvent françaises, tantôt de particularités locales ; particularités du langage et particularités des usages. Les sources permettent souvent de comprendre ces usages dévolus aux lieux qui se cachent derrière les mots, et partant de voir poindre une hiérarchie dans les maisons liégeoises. Certaines pièces semblent en effet réservées à des types précis de demeures, y assurent parfois des fonctions plus pointues. Enfin, si l’on place les textes sur une échelle chronologique, on observe que certains mots apparaissent, que d’autres s’effacent, que d’autres encore se métamorphosent ; autant de modifications du langage qui, si elles correspondent parfois à des changements dans les lieux de vie, reflètent toujours une transformation plus générale de la société de l’Ancien Régime. [less ▲]

Detailed reference viewed: 39 (6 ULg)
Peer Reviewed
See detailBrain-derived estrogens rapidly control sexual behavior in Japanese quail
Cornil, Charlotte ULg

Conference (2012, August 25)

Detailed reference viewed: 12 (1 ULg)
Full Text
See detailAmélioration des performances génétiques des races tropicales par les races wallonnes.
Leroy, Pascal ULg; Moula, Nassim ULg; Huart, Alain et al

Conference (2012, August 25)

As part of the genetic improvement of production, selection of breeds (purebred selection) on the one hand and crossbreeding, exploiting the complementarity between breeds and hybrid vigor or heterosis ... [more ▼]

As part of the genetic improvement of production, selection of breeds (purebred selection) on the one hand and crossbreeding, exploiting the complementarity between breeds and hybrid vigor or heterosis other hand, are methods choice used by animal husbandry. The pure breeding as practiced in the developed world, based on the individual performance of breeding as well as the placement of the offspring, uses expensive infrastructure and significant human resources. In addition, genetic progress is slow and must be sustained effort. For all these reasons, in the less favored regions of the world, although the intra-breed selection is operational, most stakeholders are most often uses the crossbreeding technique leading to immediate results and protecting local breeds. Thus, in dairy cattle, many countries have used the Holstein, Brown in the Alps, and the Montbéliarde Normande with varying success. In the meat sector, in cattle, swine and sheep, as well as in the area of ​​poultry meat, crossing indigenous breeds with exotic breeds imported leads to interesting results. In the Walloon Region, due to the hard work of breeders, animals have emerged exceptional and, in cattle, swine and sheep, they are in fact, more muscular animals in the world. Thus, bulls Belgian Blue reared under natural conditions, have average daily gains as high as 2000 g / d with yields close to slaughter 70% Pietrain pigs reach values ​​of the performance slaughter of around 83% and the yield values ​​as high as 59% were observed in Texel sheep. All these animals have the characteristic of being very efficient while presenting carcasses with more muscle, less fat and less bone. As for local poultry type Ardennaise, it has remarkable phenotypes leading to immediate traceability (black members), more than 150 eggs per clutch and a darker meat.The author gives in detail examples of the use of crossbreeding with cattle, sheep, pig and poultry all originated from the Walloon Region of Belgium. [less ▲]

Detailed reference viewed: 289 (91 ULg)
See detailLa résistance de Liège en août 14 et la reconnaissance française : histoire, mythe et mémoire
Bechet, Christophe ULg

Conference (2012, August 24)

Il n’est pas exagéré de dire que la décision belge de refuser l’ultimatum allemand du 2 août et la résistance consécutive de la position de Liège furent pour la France une « divine surprise ». Les ... [more ▼]

Il n’est pas exagéré de dire que la décision belge de refuser l’ultimatum allemand du 2 août et la résistance consécutive de la position de Liège furent pour la France une « divine surprise ». Les rapports de l’ambassade française à Bruxelles au cours des mois et même des années précédentes n’avaient en effet guère préparé le Quai d’Orsay au respect par le Gouvernement belge d’une stricte neutralité en cas de conflit. L’impact dans l’opinion publique française fut considérable au point que dès le 7 août 1914, la Ville de Liège se voit remettre la plus haute distinction de la République : La Légion d’Honneur. Décoration méritée car résistance il y a bien eu… Néanmoins, autour de cet événement qui aurait pu comme beaucoup d’autres histoires militaires tomber après quelques années dans les oubliettes de l’Histoire, sont venues se greffer rapidement de nombreuses implications historiographiques, politiques et culturelles. Sur le plan historiographique, il fut de bon ton de magnifier cette résistance à l’excès jusqu’à déclarer que la résistance de Liège avait permis à l’armée française de gagner du temps pour réaliser la manœuvre salvatrice de la Marne : la Ville de Liège connue pour sa francophilie séculaire avait donc permis à elle seule de sauver la République d’un désastre militaire ! Cette version de l’histoire bataille fut enseignée à des générations d’écoliers et jusqu’à l’Ecole de guerre à Bruxelles. Sur le plan politique, les cérémonies de commémoration magnifiant la résistance liégeoise constituent des occasions récurrentes de rapprochement franco-belge saluées d’ailleurs par les militants wallons et francophiles. [less ▲]

Detailed reference viewed: 76 (10 ULg)
See detailYvon Falise, architecte moderniste
Charlier, Sébastien ULg

Conference (2012, August 24)

Detailed reference viewed: 87 (6 ULg)
Full Text
See detailUne bibliothèque modèle à l’Université de Liège? : le projet De Laet
Oger, Cécile ULg; Simon, Stéphanie ULg

Conference (2012, August 24)

Durant les années 1930, la situation des bâtiments occupés par la bibliothèque de l’Université de Liège s’avère particulièrement préoccupante. Devant la menace imminente de l’effondrement d’une partie de ... [more ▼]

Durant les années 1930, la situation des bâtiments occupés par la bibliothèque de l’Université de Liège s’avère particulièrement préoccupante. Devant la menace imminente de l’effondrement d’une partie de la bibliothèque, les autorités universitaires décident la construction d’une nouvelle bibliothèque, plus adaptée aux besoins de l’époque. Le projet est confié à l’architecte Armand De Laet. Celui-ci proposera au cours des années suivantes plusieurs versions d’un bâtiment imposant, en collaboration avec le bibliothécaire en chef de l’époque. Les hostilités du second conflit mondial empêcheront néanmoins à ce projet de voir le jour. Mis de côté au début de la guerre, ce projet sera définitivement abandonné en 1945. L’heure n’est désormais plus tant à l’esthétique et au grandiose qu’au pragmatisme et à la fonctionnalité des lieux. Les documents redécouverts récemment dans les archives de la bibliothèque permettent de retracer la conception et l’évolution de ce projet de grande envergure qui s’inscrit dans la lignée de ceux qui seront réalisés à la bibliothèque de l’Université de Gand et à la Bibliothèque Royale. [less ▲]

Detailed reference viewed: 274 (79 ULg)
Full Text
Peer Reviewed
See detailLe débat sur la véritable nature du corail
Vandersmissen, Jan ULg

Conference (2012, August 24)

Detailed reference viewed: 45 (15 ULg)
Peer Reviewed
See detailLes Éduens et César. Réflexions préliminaires
Dignef, Anthony ULg

Conference (2012, August 23)

Detailed reference viewed: 29 (1 ULg)
See detailLes collections d'objets et d'oeuvres d'art de Louise de Savoie
Fagnart, Laure ULg

Conference (2012, August 23)

Detailed reference viewed: 32 (3 ULg)
See detailLa tenture de l'Histoire d'Hercule des Musées royaux d'Art et d'Histoire de Bruxelles
Laruelle, Anne-Sophie ULg

Conference (2012, August 23)

Les Musées royaux d’Art et d’Histoire conservent quatre tapisseries du XVIe siècle qui formaient autrefois une tenture des Travaux d’Hercule. Ces pièces illustrent différents exploits du héros grec : ses ... [more ▼]

Les Musées royaux d’Art et d’Histoire conservent quatre tapisseries du XVIe siècle qui formaient autrefois une tenture des Travaux d’Hercule. Ces pièces illustrent différents exploits du héros grec : ses combats face à Cacus, Antée, Diomède et sa lutte contre les Centaures qui avaient capturé Hippodamie. Le thème des Travaux d’Hercule était fortement apprécié dans l’art de la tapisserie flamande du XVe au XVIIe siècle. Les quatre pièces de Bruxelles ont fait l’objet de multiples recherches portant sur l’iconographie, les bordures, l’atelier de production et les compositions. [less ▲]

Detailed reference viewed: 110 (10 ULg)